Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Assets	$ 546,658	$ 523,584
Cash and cash equivalents	19,250	30,521	$ 30,253	$ 11,846
Disposal Group, Including Discontinued Operation, Assets	151	178
Aluminum Extrusions [Member]
Assets	302,392	280,521
PE Films [Member]
Assets	105,434	113,613
Flexible Packaging Films [Member]
Assets	96,676	75,269
Subtotal
Assets	504,502	469,403
General Corporate
Assets	$ 22,755	$ 23,482